385. (5) By means of this correspondence many arcana relating to the will and understanding, thus also to love and wisdom, may be disclosed. In the world it is scarcely known what the will is or what love is, for the reason that man is not able, by himself, to love, and from love to will, although he is able as it were by himself to exercise intelligence and thought; just as he is not able of himself to cause the heart to beat, although he is able of himself to cause the lungs to respire. Now because it is scarcely known in the world what the will is or what love is, but it is known what the heart and the lungs are, - for these are objects of sight and can be examined, and have been examined and described by anatomists, while the will and the understanding are not objects of sight, and cannot be so examined - therefore when it is known that these correspond, and by correspondence act as one, many arcana relating to the will and understanding may be disclosed that could not otherwise be disclosed; those for instance relating to the conjunction of the will with the understanding, and the reciprocal conjunction of the understanding with the will; those relating to the conjunction of love with wisdom, and the reciprocal conjunction of wisdom with love; also those relating to the derivation of love into affections, and to the consociation of affections, to their influx into perceptions and thoughts, and finally their influx according to correspondence into the bodily acts and senses. These and many other arcana may be both disclosed and illustrated by the conjunction of the heart and lungs, and by the influx of the blood from the heart into the lungs, and reciprocally from the lungs into the heart, and therefrom through the arteries into all the members, organs and viscera of the body.